2to3: Use absolute imports.

The new import `absolute_import` is added the `from __future__ import`
statement and The 2to3 `import` fixer is run to make the imports
compatible. There are several things that need to be dealt with to make
this work.

1) Files meant to be run as scripts run in a different environment than
files imported as part of a package, and so changes to those files need
to be skipped. The affected script files are:

    * all setup.py files
    * numpy/core/code_generators/generate_umath.py
    * numpy/core/code_generators/generate_numpy_api.py
    * numpy/core/code_generators/generate_ufunc_api.py

2) Some imported modules are not available as they are created during
the build process and consequently 2to3 is unable to handle them
correctly. Files that import those modules need a bit of extra work.
The affected files are:

    * core/__init__.py,
    * core/numeric.py,
    * core/_internal.py,
    * core/arrayprint.py,
    * core/fromnumeric.py,
    * numpy/__init__.py,
    * lib/npyio.py,
    * lib/function_base.py,
    * fft/fftpack.py,
    * random/__init__.py

Closes #3172

6 files changed, 6 insertions, 6 deletions

diff --git a/doc/swig/test/testArray.py b/doc/swig/test/testArray.py
index b25aff85a..433dfb1bd 100755
--- a/doc/swig/test/testArray.py
+++ b/doc/swig/test/testArray.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env python
-from __future__ import division
+from __future__ import division, absolute_import
 
 # System imports
 from   distutils.util import get_platform
diff --git a/doc/swig/test/testFarray.py b/doc/swig/test/testFarray.py
index 184fd2564..c0699b07d 100755
--- a/doc/swig/test/testFarray.py
+++ b/doc/swig/test/testFarray.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env python
-from __future__ import division
+from __future__ import division, absolute_import
 
 # System imports
 from   distutils.util import get_platform
diff --git a/doc/swig/test/testFortran.py b/doc/swig/test/testFortran.py
index 56bc03eae..499f6a439 100644
--- a/doc/swig/test/testFortran.py
+++ b/doc/swig/test/testFortran.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env python
-from __future__ import division
+from __future__ import division, absolute_import
 
 # System imports
 from   distutils.util import get_platform
diff --git a/doc/swig/test/testMatrix.py b/doc/swig/test/testMatrix.py
index 68259de3e..187cd7214 100755
--- a/doc/swig/test/testMatrix.py
+++ b/doc/swig/test/testMatrix.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env python
-from __future__ import division
+from __future__ import division, absolute_import
 
 # System imports
 from   distutils.util import get_platform
diff --git a/doc/swig/test/testTensor.py b/doc/swig/test/testTensor.py
index 41b037811..cd9cada46 100755
--- a/doc/swig/test/testTensor.py
+++ b/doc/swig/test/testTensor.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env python
-from __future__ import division
+from __future__ import division, absolute_import
 
 # System imports
 from   distutils.util import get_platform
diff --git a/doc/swig/test/testVector.py b/doc/swig/test/testVector.py
index 2ad00b856..29a77d281 100755
--- a/doc/swig/test/testVector.py
+++ b/doc/swig/test/testVector.py
@@ -1,5 +1,5 @@
 #! /usr/bin/env python
-from __future__ import division
+from __future__ import division, absolute_import
 
 # System imports
 from   distutils.util import get_platform